Wrap unittest.main in a compatibility wrapper for Python 3.1 compatibility. Fixes #183

CHANGES.txt

@@ -2,6 +2,12 @@
 CHANGES
 =======
 
+-----
+3.4.2
+-----
+
+* Issue #183: Fix additional regression in test command on Python 3.1.
+
 -----
 3.4.1
 -----

setuptools/command/test.py

+import unittest
+from unittest import TestLoader
+
 from setuptools import Command
 from distutils.errors import DistutilsOptionError
 import sys
 from pkg_resources import (resource_listdir, resource_exists,
     normalize_path, working_set, _namespace_packages, add_activation_listener,
     require, EntryPoint)
-from unittest import TestLoader
+
+from setuptools.py31compat import unittest_main
+
 
 class ScanningLoader(TestLoader):
 
@@ -141,8 +146,6 @@ class test(Command):
                 self.with_project_on_sys_path(self.run_tests)
 
     def run_tests(self):
-        import unittest
-
         # Purge modules under test from sys.modules. The test loader will
         # re-import them from the build location. Required when 2to3 is used
         # with namespace packages.
@@ -158,7 +161,7 @@ class test(Command):
                         del_modules.append(name)
                 list(map(sys.modules.__delitem__, del_modules))
 
-        unittest.main(
+        unittest_main(
             None, None, [unittest.__file__]+self.test_args,
             testLoader=self._resolve_as_ep(self.test_loader),
             testRunner=self._resolve_as_ep(self.test_runner),

setuptools/py31compat.py

+import sys
+import unittest
+
 __all__ = ['get_config_vars', 'get_path']
 
 try:
@@ -35,3 +38,15 @@ except ImportError:
             except OSError: #removal errors are not the only possible
                 pass
             self.name = None
+
+
+unittest_main = unittest.main
+
+_PY31 = (3, 1) <= sys.version_info[:2] < (3, 2)
+if _PY31:
+    # on Python 3.1, translate testRunner==None to defaultTestLoader
+    # for compatibility with Python 2.6, 2.7, and 3.2+
+    def unittest_main(*args, **kwargs):
+        if 'testRunner' in kwargs and kwargs['testRunner'] is None:
+            kwargs['testRunner'] = unittest.defaultTestLoader
+        return unittest.main(*args, **kwargs)